diff --git a/README.md b/README.md
index 412be38c17989da774c5bcaa055a26172b080ce9..a0743957cdc178bbd04ba1496e38a874fed78c74 100644
--- a/README.md
+++ b/README.md
@@ -65,6 +65,8 @@ To build on Linux:
     sudo apt-get install phonon libqt4-dev libphonon-dev libphonon4 phonon-backend-gstreamer qtcreator libsdl1.2-dev libflite1 flite1-dev build-essential libopenscenegraph-dev
     cd directory
     git clone https://github.com/mavlink/qgroundcontrol.git
+    git submodule init
+    git submodule update
 
 * go to `libs/thirdParty -> libxbee` 
 * Create Library -> Readme file in folder